176F2143 by Danfoss

The 176F2143 is a replacement power module called a PowerCard produced by Danfoss for the VLT PowerCards series. Installed inside VLT medium-voltage variable-frequency drives, the board collects incoming three-phase mains power and routes it to the rectifier, converter, and protective circuitry. By consolidating high-current paths on a compact printed circuit assembly, the card restores normal drive operation after a failed internal module and fits the existing enclosure without changes to surrounding hardware. Its role in the drive is limited to power distribution, so control and user-interface functions remain on separate boards within the same chassis.

The mains input range coded as 7 covers 525-690 VAC, which suits 600 V class grids. The card is wired for a three-phase supply, so each line conductor terminates on a dedicated copper track for balanced current flow. Twelve rectifier diodes are arranged in a 12-pulse topology that reduces input harmonic distortion compared with six-pulse designs. The module has a gross mass of 1 kg, which keeps handling straightforward during installation or replacement. The board occupies 14.235 dm³ of space, allowing it to fit the standard drive housing without mechanical modification.

Integrated line filters labeled as B-type attenuate conducted radio-frequency noise so the drive can operate with reduced interference on plant power systems. The printed circuit is classified as a power card, indicating that its layout and conductor spacing are intended for elevated current and voltage stress. For identification, the unit carries the EAN code 5710107586653, which supports accurate part matching in service records. The module is intended for use as an internal replacement where the existing drive enclosure and supply connections remain unchanged. This helps distinguish the board from lower-voltage cards that use different copper layouts and input sections.